Central Bureau for Astronomical Telegrams
IAUC 4805: 1989o; 1989M
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Read IAUC 4806
Circular No. 4805
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
PERIODIC COMET BRORSEN-METCALF (1989o)
The following orbital elements by B. G. Marsden, Center
for Astrophysics, satisfy 40 observations 1919-1989. The ephemeris
magnitudes are based on a formula by C. S. Morris (1989 Comet
Handbook).
Epoch = 1989 Oct. 1.0 ET
T = 1989 Sept.11.9395 ET Peri. = 129.6256
e = 0.971970 Node = 310.8761 1950.0
q = 0.478748 AU Incl. = 19.3306
a = 17.079716 AU n = 0.0139631 P = 70.586 years
1989 ET R.A. (1950) Decl. Delta r m1
July 3 0 19.93 +10 20.3 1.102 1.523 10.9
8 0 36.60 +13 35.3
13 0 56.48 +17 21.2 0.901 1.362 10.0
18 1 20.83 +21 41.3
23 1 51.43 +26 34.1 0.739 1.196 9.0
28 2 30.54 +31 45.8
Aug. 2 3 20.34 +36 42.0 0.640 1.026 8.0
7 4 21.01 +40 24.8
12 5 28.06 +41 56.5 0.633 0.855 7.1
17 6 33.00 +41 00.2
22 7 29.08 +38 08.8 0.726 0.688 6.4
27 8 14.79 +34 10.8
Sept. 1 8 52.01 +29 40.7 0.898 0.547 5.8
6 9 23.40 +24 55.3
11 9 51.11 +20 03.0 1.118 0.479 5.7
16 10 16.37 +15 12.1
21 10 39.62 +10 32.6 1.342 0.527 6.5
SUPERNOVA 1989M IN NGC 4579
R. H. McNaught, Siding Spring Observatory, reports the following
position measured from an Uppsala Southern Schmidt film taken
July 7.4 UT: R.A. = 12h35m09.23, Decl. = +12 05'55".6 (equinox
1950.0). R. Kirshner and E. Schlegel, Center for Astrophysics, report
that spectra of SN 1989M obtained by J. Peters at the F. L. Whipple
Observatory on July 7 confirm the classification as type
Ia near maximum light (cf. IAUC 4802).
1989 July 7 (4805) Daniel W. E. Green
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